On Fri, Jun 13, 2014 at 12:09 PM, James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx> wrote: > On Fri, 2014-06-13 at 11:52 -0700, Christoph Hellwig wrote: >> On Fri, Jun 13, 2014 at 10:58:22AM -0700, Venkatesh Srinivas wrote: >> > CC-ing stable as 3.14 and 3.15 are affected; a conservative fix is to >> > enable no_async_abort until the problem is better-understood. >> >> No patch attached. Nevermind this is not a consdervative fix, but a >> band aid. The proper fix is to figure out what's actually going on >> here. >> >> >From your trace above it very much looks like a double completion of >> some sort. >> >> I've looked at the virtio-scsi code a bit, and one odd thing it does >> that comes in handy here is that it doesn't really use a traditional >> tag, but rather the address of the scsi command. > > What kernel version? This is the exact signature of the original USB > REQUEST_SENSE problem. Mix of kernels, all 3.14-based. Debian 3.14-0.bpo, Gentoo's 3.14, upstream from git as of a few days ago. Distribution 3.13 and earlier kernels (Debian's 3.2.0-4, Debian 3.13-0.bpo.1, Gentoo 3.13.6) do not hit this issue with the same workload. -- vs; -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
